Alloy



- Patented Feb. 24, 1925'.

UNITED STATES PATENT OFFICE.

GERALD R. BROIPHY, 01E SCHENECTADY, NEW YORK, ASSIG-NOR T GENERAL ELEC-TBIC COMPANY, A GORPQRATION OF NEW YORK.

ALLOY.

No Drawing.

To all whom it may concern.

Be it known that I, GERALD R. Bnorrn', a citizen of the United States,residing at Schenectady, in the county of Schenectady, State of NewYork, have invented certain new and useful Improvementsin Alloys, of

which the following is a specification.

My invention relates to a new and useful alloy, and more particularly,to an alloy,

adapted to Withstand repeated heating and of the entire alloy, with themolybdenum between one and three per cent, the remainder of the'alloybeing commercial iron,

whicliggiroeiserves as the base of the alloy.

One of best mixtures is ten per cent aluminum and two per centmolybdenum,

andthebalance of iron. I have found that it is possible to obtain a muchfiner grain by the addition of a small percentage of titanium. Thisshould be less than one and one-half per cent, and the best value, Ibelieve, is one-half er cent.

In order to pr uce this alloy it is necessary that the iron be preventedfrom oxidizing during the casting process, and for this purpose I use acryoliteflux which floats on the molten metal and which may be withdrawnin the usual manner.

The alloy "made as described above, has

been used for'making castings used in the Application filed August 6,1920. Serial No. 401,651.

heat treatment of steel, such as'carbonizing etc. which have beensubjected to repeated heating and cooling@ This usage did not have anybad effect on the metal and the castings did not crack under thisservice.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. An alloy having an iron base, and containing aluminum and from 1 to 3per cent of molybdenum, the percentage ofaluminlun being at least twicethat of the molybdenum.

2. An alloy having iron as a base and containing at least six per centaluminum, and one to three per cent molybdenum.

3. An alloy having iron as a base and containing about ten per centaluminum and about two per cent'molybdenum.

4. An, alloy having an iron content of at least 80 per cent, theremainder being composed of aluminum, from 1 to 3 per cent ofmolybdenum, and less than 1 per cent of titanium, the percentage ofaluminum being at least twice that of the molybdenum.

5. An alloyhaving iron as a base, and containing at least six per centaluminum, one to three per cent molybdenum, and. less than one andone-half per cent of titanium.

6. An alloy having iron as a base and containing about ten per centaluminum, about two per cent molybdenum .and about one-half percenttitanium.

7 An alloy containing between and er cent of commercial iron, theremainder )eingcomposed of at least 6 per cent of aluminum, from 1 to 3per cent of molybdenum, and about per cent of titanium. In witnesswhereof, I have hereunto set Imy hand this 5th day of August 1920.

GERALD R. BROPHY.

